Hand-vise.



No. 823,611. PATENTED JUNE 19, 1906. H. T. MARTIN.

HAND VISE.

APPLIOATION FILED APR.7. 1906.

I K J A INVENTOR ATTORNEYS.

cam m 00., PHmO-LIMOGMPNERS WASNYNGYON u c UN TED -M l mm OFFICE HAND-vista.

' No. saae i.

" Specification of .Letters'Patent.

Patented June 19, 1906.

' Application filed April '7, 1906. Serial No. 31 A54.

T0 aZZ whom it may cancer-rut Be it known that, I, HARRY T. MARTIN, a

I citizen of the United States, residing at the city of Milwaukee, county of Milwaukee, and

State of Wisconsin, have invented new anduseful Improvements in Hand-Vises, of which I the following is a specification.

My invention relates to improvements in hand-vises; and it pertains to that class in which the clamping-jaws of the vise are parallel with each other both when in their opened and closed positions and at all intermediate points between their opened and closed positions.

The construction of my invention is explained by reference to the accompanying drawings, in which Figure 1 is a plan view, and Fig. 2 a longitudinal transverse section.

Like parts are identified by the same reference characters throughout both views.

A A represent the clamping-jaws, which are pivotally supported from the central screw threaded shaft B by two sets of crossed levers O C, D D, pivotal bolt E, collar F, nut G, and pivot H. It will be understood that the screw-threaded shaft B is rigidly fixed to the handle I and is adapted to turn freely within the collar F, while the nut G- is adapted to move forwardly and backwardly upon said shaft B as the same is turned toward the right and left. The crossed levers C are secured at a fixed oint to the jaws A by the pivots J J, while t eir opposite ends are secured to the opposite ends of said jaws by pivots K K, operating in the elongated slots the diverging ends of the crossed levers Dare also secured to the contiguous ends of the crossed levers O by said pivots K, the same pivots K being adapted to serve the twofold pur ose of connecting the contiguous ends of t e levers C and D and also to connect the contiguous ends of said levers with said jaws within the slots L. Thus it will be obvious that when the 'aws are held in connection with a nut or ot er object which it is desirous to clamp and the handle I is turned forward the nut Gwill be drawn rearwardly, or toward the handle on the screw-threadedshaft B, whereby saidjaws A will be drawn toward each other and caused to clamp the nut or other object, while by a reverse movement of the handle the nut G will be caused to move forwardly or away from the handle, whereby said jaws will be separated prepara- L L, formed in said jaws, while I to grasping the object is sirous to clamp. It will also beobvious that by this arrangement both the front and rear ends of the clamping-jaws will be retained parallel to each other as the clamping-surfaces of the jaws are moved toward or from each other.

For the purpose of distinguishing between the crossed levers C' and the crossed levers D the crossed levers O are herein referred to as the two-arm crossed levers, the outer ends of which are all connected with the parallel jaws, while the crossed levers D are referred to as -one-arm crossed levers. I

The screw threaded shaft B is hollow throughout its entire length and extends throughout the entire length of the handle I, whereby when twisting a wire or other similar material the same can be drawn longitudinally through the handle and shaft, while the clamping-j aws are simultaneously used for twisting or bending the same. To facilitate holding the wire while bending or twisting the same, the opposing clamping-faces of the jaws 8c are provided with V-shaped notches M.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a hand-vise of the class described the combination of a pair of parallel jaws, a screwthreaded shaft centrally located between said jaws, two pairs of crossed levers pivotally connected at their outer or diverging ends with said jaws and at their convergo ing ends through a sleeve and nut with said central shaft.

2. In a hand-vise of the class described the combination of a pair of parallel jaws, a screw-threaded shaft provided with an oper' ating-handle centrally located between said jaws, two pairs of crossed levers locatedupon' the respective sides of said jaws and central shaft, both pairs of said levers being pivotally connected at their outer or diverging 10o ends with said jaws and at their converging ends through a sleeve and nut with said central shaft.

3. In a hand-vise of the class described the combination of a screw-threaded shaft provided with an operating-handle centrally located between said jaws, .two pairs of two-armed crossed levers and two pairs of one-arm crossed levers located upon the respective sides of said jaws 11c and central shaft, both pairs of said leversbeing pivotally connected at their outer or diair of parallel jaws, a v

verging ends with said jaws and at their converging ends one through a sleeve and the other through a nut with said central shaft, one end of both pairs of said two-armed crossed levers being provided with sliding pivotal connections with one end of said aws.

J 4. In a hand-vise of the class described the combination of a pair of parallel jaws, a hol- 10 low screw-threaded shaft centrally located between said jaws, two pairs of crossed levers pivotally connected at their outer or diverging ends with said jaws and at their con verging ends through a sleeve and nut with said central shaft.

In testimony whereof I aflix my signature in the presence of two witnesses.

HARRY T. MARTIN.

Witnesses:

JAS. B. ERWIN, O. R. ERWIN. 

